Merge "omx: validate only standard OMX roles" into sc-dev am: af592fb124 am: aae88ba179 am: 9ac48cecef

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/15528285

Change-Id: Ie84e3491e874d11e4802d73c2cafcde3cf296b12